{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{longtable}{l*{4}{c}}
\caption{Reduced Form Diff-in-Diff Results - Gas Use \label{tab:GasUseRFDiD}}\\
\hline\hline\endfirsthead\hline\endhead\hline\endfoot\endlastfoot
                &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                &\multicolumn{1}{c}{\makecell{No \\ DSCs}}&\multicolumn{1}{c}{\makecell{Documented \\ DSCs}}&\multicolumn{1}{c}{\makecell{Suspected \\ DSCs}}&\multicolumn{1}{c}{\makecell{Potential \\ DSCs}}\\
                &     b/se   &     b/se   &     b/se   &     b/se   \\
\hline
Mean Gas Price ($/Million Btu)&            &            &            &            \\
nosafetyind\_res &   -0.015   &   -0.015   &   -0.017   &   -0.015   \\
                &  (0.010)   &  (0.010)   &  (0.010)   &  (0.010)   \\
\hline
Observations    &     2429   &     2429   &     2429   &     2429   \\
R\textsuperscript{2}&    0.999   &    0.999   &    0.999   &    0.999   \\
\hline\hline
\multicolumn{5}{l}{\footnotesize * p \textless 0.1, ** p \textless 0.05, *** p \textless 0.01}\\
\multicolumn{5}{l}{\footnotesize Note: All models include state and year fixed effects as well as state-level time trends.}\\
\multicolumn{5}{l}{\footnotesize All models cluster standard errors  by state.}\\
\end{longtable}
}
